Search found 367 matches

by thunderstorm80
May 28 2020 6:17pm
Forum: Battery Technology
Topic: Cell voltage via BMS terminal sags while current is flowing
Replies: 0
Views: 11

Cell voltage via BMS terminal sags while current is flowing

Hi, I have a 24S A123 battery I have built myself, by using the common screw metal tabs with M5 screws for fastening. I attach a picture of a battery during assembly so you can see what I mean. Since each tab has two screws, then each side of the pack is terminated with two heavy gauge wires, that h...
by thunderstorm80
May 28 2020 5:54pm
Forum: Battery Technology
Topic: Real-time cells voltage display instead of BMS
Replies: 1
Views: 25

Real-time cells voltage display instead of BMS

Hi, As I manually balance my A123 20Ah pack for 4 years, and as they slowly age, I wanted to have an onboard voltage monitor which shows all 24 cells at the same time. I already have a big handle-bar bag which is secured firmly and I have plenty of surface area on it to mount any voltage grid matrix...
by thunderstorm80
Apr 26 2020 7:59am
Forum: Motor Technology
Topic: Grin's MXUS 6T cassette-hub issue
Replies: 0
Views: 430

Grin's MXUS 6T cassette-hub issue

Hi, I bought from Grin their MXUS 6T some time ago: https://www.ebikes.ca/shop/discontinued/mx3006rc.html It was one of the few at the time that came with the modern cassette-hub. That freewheel had some strange noises in addition to the normal pawl clicking noises right from the start but I assumed...
by thunderstorm80
Apr 26 2020 7:46am
Forum: E-Bike Technical
Topic: Tektro HD-E350 hydraulic e-brake issue
Replies: 0
Views: 388

Tektro HD-E350 hydraulic e-brake issue

Hi, I am using Tektro hydraulic disc brake that has a built-in e-brake signal switch. I have it on all my e-bikes. They are identical to Shimano - using the same calipers, priced the same, and work great as kinetic-energy robbers. However, I noticed, recently, that the latch-in/latch-out point of th...
by thunderstorm80
Mar 25 2020 1:18pm
Forum: E-Bike Technical
Topic: PhaseRunner without Plug-Braking
Replies: 10
Views: 294

Re: PhaseRunner without Plug-Braking

thanks thunderstorm, at maybe 5mph, when I leave my back lane theres a stop sign 20 feet away and I push my regen button, it feels like it turns on, then off, then back on but quickly. that's the plug brake transition im feeling? I run a 3540 with a 24x3.0 and hitting the regen at 60km/h. I noticed...
by thunderstorm80
Mar 25 2020 4:50am
Forum: E-Bike Technical
Topic: PhaseRunner without Plug-Braking
Replies: 10
Views: 294

Re: PhaseRunner without Plug-Braking

I have a newer phaserunner, I don't know what plug braking is but I can tell you how my regen feels. with battery regen at 70v/20 amps, I think regen phase at 60 and regen torque ramp up 200 ms. id get 1400 watts regen and I don't need to use my brakes to stop but regen braking at high speed, I onl...
by thunderstorm80
Mar 25 2020 4:47am
Forum: E-Bike Technical
Topic: PhaseRunner without Plug-Braking
Replies: 10
Views: 294

Re: PhaseRunner without Plug-Braking

Try an earlier windows or compatibility mode. Probably an easier solution than relying on one of the few people here with an updated bacdoor binary to send you. This is why I made that post, with the hope of finding someone with experience with flashing the firmware of the phase runner, and that ha...
by thunderstorm80
Mar 25 2020 4:43am
Forum: E-Bike Technical
Topic: PhaseRunner without Plug-Braking
Replies: 10
Views: 294

Re: PhaseRunner without Plug-Braking

I have two of the newer Phaserunner L10's, purchased in August and September 2019. They both transition to plug braking at low speed, consuming power to bring the bike to a complete stop, as their default behavior. The transition from regen to plug braking is quite obvious and a bit jarring (the br...
by thunderstorm80
Mar 24 2020 11:53am
Forum: E-Bike Technical
Topic: PhaseRunner without Plug-Braking
Replies: 10
Views: 294

PhaseRunner without Plug-Braking

Hi, I understand that newer versions of the PR, come without plug-braking. That is - regen intensity diminishes as you approach zero speed, but at no point a positive current will be drawn from the battery in order to provide that negative torque. Plug-braking cannot be disabled via the software sui...
by thunderstorm80
Mar 11 2020 8:53am
Forum: Battery Technology
Topic: bluetooth BMS?
Replies: 1444
Views: 175679

Re: Which is better?

Seems to me most reco the JBD/LLT BMSs over the ANT? I want to be able to wire up independent battery modules, say 3P7S, then be able to put them together into 21S strings, and/or also in parallel for higher Ah capacity. Planning to bypass the power current and drive external relays, charging HVC s...
by thunderstorm80
Mar 10 2020 8:42am
Forum: Battery Technology
Topic: BMS "steam release" post
Replies: 27
Views: 1318

Re: BMS

FYI and yes not from my own anecdote , but reading over thousands of posts in many dozens of forums, most reco the JBD/LLT BMSs over the ANT LLT Power, SHEN ZHEN LI LU TONG ELECTONIC TECHNOLOGY https://www.lithiumbatterypcb.com/product-instructionev-battery-pcb-boardev-battery-pcb-board/ev-battery-...
by thunderstorm80
Mar 10 2020 7:31am
Forum: Battery Technology
Topic: BMS "steam release" post
Replies: 27
Views: 1318

Re: BMS "steam release" post

Yes, you are wrong :wink: I’ve run mine at 350-400A (though only for short periods of time) Could I ask you few questions about the device that will probably be relevant to others? (like 999zip999) 1. I understand you use the 300A model? I think the 100A model would be enough for me, if it can hand...
by thunderstorm80
Mar 10 2020 2:34am
Forum: Battery Technology
Topic: BMS "steam release" post
Replies: 27
Views: 1318

Re: BMS "steam release" post

That BMS looks interesting. I have a 24s pack with 1,480 cycles 6.5 year's 24,000 miles no BMS just have 4-. 6s sense wire. Bulk charge as two 12s. And only balance only once a year or so You talk about the ANT BMS right? Yes, definitely. It seems like THE solution for A123 guys like us. And it can...
by thunderstorm80
Mar 09 2020 4:19pm
Forum: Battery Technology
Topic: BMS "steam release" post
Replies: 27
Views: 1318

Re: BMS "steam release" post

Think the “Ant” 300A smart bms does what you want. You can set any voltage limits. https://a.aliexpress.com/_BT3U6r It’s also in the bluetooth bms thread. I’ve used one for a year, no issues. I like the possibility to read out individual cell voltages, screen is also a plus for me. Wow! That is per...
by thunderstorm80
Mar 09 2020 8:41am
Forum: Battery Technology
Topic: BMS "steam release" post
Replies: 27
Views: 1318

Re: BMS

Man, you sure come off as entitled with your complaints, are you trying to discouraging responses? You kinda asked for it though. You could have just directly answered his question to start with (like you eventually did, thank you), rather than multiple posting about tangential/unrequested informat...
by thunderstorm80
Mar 08 2020 6:33am
Forum: Battery Technology
Topic: BMS "steam release" post
Replies: 27
Views: 1318

Re: BMS, Arduino, and cell voltage monitoring

So I thought, let's compromise. Let's take Arduino which has 6-8 analog inputs, and add an input extension shield like this one so I can read all 24 cells into the same Arduino board: http://www.dadaelectronics.eu/shop/arduino/analog-input-extension-shield-for-arduino-r-ka12-kit Unfortunately the p...
by thunderstorm80
Mar 08 2020 6:29am
Forum: Battery Technology
Topic: BMS "steam release" post
Replies: 27
Views: 1318

Re: BMS, Arduino, and cell voltage monitoring

3. LVC, only one required to actually be mounted on the bike while in use. A CAv3 and/or many controllers should be primary on this function at the pack level, BMS there as a failsafe. With a top-balanced pack, careful observation and calibration of the pack level cutoff can obviate the need for ce...
by thunderstorm80
Mar 07 2020 3:42pm
Forum: Battery Technology
Topic: BMS "steam release" post
Replies: 27
Views: 1318

BMS "steam release" post

Hi, This post is a bit "steamy", so I warn you beforehand. It's just that I feel kind of hopeless, so I thought to ask the community, and I am almost 100% sure that someone on ES had the same needs and found a solution. I am still using my A123 20Ah prismatic cells without BMS for 4 years by now. Th...
by thunderstorm80
Sep 19 2019 12:07pm
Forum: Battery Technology
Topic: Paralleling LiFe with Li-Ion - How to match the discharge curves?
Replies: 4
Views: 326

Re: Paralleling LiFe with Li-Ion - How to match the discharge curves?

You really can't match those discharge curves. But if you must run that way, run till voltages match, then connect. Run till the A123's are empty, Then STOP. I seriously doubt your GA's are waiting. But current will flow both ways, depending on the needs. Its near impossible to see what is really h...
by thunderstorm80
Sep 18 2019 7:02am
Forum: Battery Technology
Topic: Paralleling LiFe with Li-Ion - How to match the discharge curves?
Replies: 4
Views: 326

Paralleling LiFe with Li-Ion - How to match the discharge curves?

Hi, My main battery is A123 79V 20Ah. On long distances, I add 72V 23Ah Li-Ion battery with GA cells which on the paper is excellent in capacity and supplement the more powerful (but heavier) A123. On practice, the A123 has a flat discharge curve (~3.3V through most of the SOC) while a standard Li-I...
by thunderstorm80
Aug 05 2019 4:34am
Forum: E-Bike Technical
Topic: A portable gasoline generator for long range
Replies: 50
Views: 4005

Re: A portable gasoline generator for long range

Re the running costs. yeah, gas is about 4 cents a mile for the Suzuki, 65 mpg makes the gas cost little. And gas is again dirt cheap in the USA. But to go 80 miles per charge, over a mountain or two, then you don't get an e bike for 1500 bucks. More like that just for battery, and needing it repla...
by thunderstorm80
Jul 28 2019 1:42am
Forum: Battery Technology
Topic: Considering BMS (or just monitoring) for LiFe cells
Replies: 7
Views: 522

Re: Considering BMS (or just monitoring) for LiFe cells

I will move to 18650 and get a BT bms at that point. I just don't know which cell will last and not have mega voltage sag. A123 lifepo4 iis pretty flat discharge. And big and heavy. How many amps at discharge and charge ? On the 25S E-bike, with two DD motors, the peak discharge current reaches 110...
by thunderstorm80
Jul 26 2019 2:54am
Forum: Battery Technology
Topic: Considering BMS (or just monitoring) for LiFe cells
Replies: 7
Views: 522

Re: Considering BMS (or just monitoring) for LiFe cells

I just have 4-6s sense wires and monitor with a cellog. And use a una9 plus+ thru the sense wire balance charger if ever needed. Maybe 4 - 6 times. With my ping. One channel on the bms drain one cell to zero. Ouch bms no thanks. Sorry me no like bms. I can regen 1,000 watts how would a bms like tha...
by thunderstorm80
Jul 26 2019 2:38am
Forum: E-Bike Technical
Topic: A Phaserunner-like controller with 12FETs ?
Replies: 5
Views: 551

Re: A Phaserunner-like controller with 12FETs ?

Just spoke to Justin about it, and he says they will get few units of those and flash them with their firmware, compatible with their suite. But the BacDoor signal connector will still be the same...
by thunderstorm80
Jul 26 2019 2:36am
Forum: E-Bike Technical
Topic: A portable gasoline generator for long range
Replies: 50
Views: 4005

Re: A portable gasoline generator for long range

Quick math. If my ebike cost me $1500 and I've ridden 9000 miles on it, ignoring the approximately $35 spent in electricity, I've spent 16.6 cents/mile. Realistically, my ebike has probably cost me more than $1500 If I were to consider all maintenance and all the various things I've experimented wi...